<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
    <style type="text/css">
			body {background-color: yellow}
			h1 {background-color: #00ff00}
			h2 {background-color: transparent}
			p {background-color: rgb(250,0,255)}
			p.no2 {background-color: gray; padding: 10px;}

    </style>
</head>
<body>
<h1>这是标题 1</h1>
<h2>这是标题 2</h2>
<p>这是段落</p>
<p class="no2">这个段落设置了内边距。</p>
</body>
</html>
